Not just for Zendikar Rising, either
Special mention goes to: Mirari's Wake is an amazing mana doubling effect that also buffs your creatures Awakening Zone makes versatile tokens that accelerate, attack, block, whatever The aforementioned Into the North combo with Arctic Flats and Highland Weald Options include: Arbor Elf, Llanowar Elves, Elvish Mystic, Avacyn's Pilgrim, Sakura-Tribe Elder, Farhaven Elf, Wood Elves, Yavimaya Dryad, Oracle of Mul Daya, Solemn Simulacrum, Awakening Zone, Mirari's Wake, Cultivate, Explosive Vegetation, Kodama's Reach, Farseek, Into the North, Rampant Growth, Boros Signet, Chromatic Lantern, Gruul Signet, Selesnya Signet Card Advantage My top picks would be: Skullclamp, Greater Good, and Mentor of the Meek, in that order
Myr Retriever and Dualcaster Mage aren't super expensive, but both are foundational cards many combos rely on and fine value pieces on their own, so they're worth adding to your collection
Fair warning: this infection is liable to spread
Tap to double the various counters on one creature
All of these folks have a powerful presence and really feel like the next Titan cycle
